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The Forbush decrease observed by the SEVAN particle detector network in the 25th solar activity cycle
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SYSNO ASEP 0588201 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The Forbush decrease observed by the SEVAN particle detector network in the 25th solar activity cycle Author(s) Karapetyan, T. (AM)
Chilingarian, A. (AM)
Hovsepyan, G. (AM)
Martoyan, H. (AM)
Sargsyan, B. (AM)
Langer, R. (SK)
Chum, Jaroslav (UFA-U) RID, ORCID
Nikolova, N. (BG)
Angelov, H. (BG)
Haas, D. (DE)
Knapp, J. (DE)
Walter, M. (DE)
Ploc, Ondřej (UJF-V) RID, ORCID, SAI
Šlegl, Jakub (UJF-V) ORCID, SAI
Kákona, Martin (UJF-V) ORCID, SAI
Ambrožová, Iva (UJF-V) RID, ORCID, SAINumber of authors 16 Article number 106305 Source Title Journal of Atmospheric and Solar-Terrestrial Physics. - : Elsevier - ISSN 1364-6826
Roč. 262, Sept. (2024)Number of pages 14 s. Language eng - English Country GB - United Kingdom Keywords Atmospheric electric field ; Barometric coefficient ; Forbush decrease ; Geomagnetic field ; ICME Subject RIV BF - Elementary Particles and High Energy Physics OECD category Particles and field physics Subject RIV - cooperation Nuclear Physics Institute - Athmosphere Sciences, Meteorology R&D Projects EF15_003/0000481 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UFA-U - RVO:68378289 ; UJF-V - RVO:61389005 UT WOS 001284408000001 EID SCOPUS 85199889775 DOI https://doi.org/10.1016/j.jastp.2024.106305 Annotation The temporal variations of cosmic-ray intensity, measured by ground-based detectors at various latitudes, longitudes, and altitudes, are related to the geophysical and solar phenomena. The latter are interplanetary coronal mass ejections and fast solar wind from coronal holes, which cause interplanetary magnetic field (IMF) abrupt variations near Earth. Interacting with the magnetosphere, they cause worldwide sudden decreases (Forbush decreases, FDs) of intensity followed by gradual recovery. The amplitude of the flux depletion depends on the type and energy of the registered particle, which in turn depends on geographical coordinates and the detector's energy threshold and selective power. SEVAN particle detector network with nodes in Europe and Armenia selects three types of particles that demonstrate coherent depletion and recovery and correspond to different energy galactic protons interacting with disturbed magnetospheric plasmas. On November 3–4, 2021, an interplanetary coronal mass injection (ICME) hit the magnetosphere, sparking a strong G3-class geomagnetic storm and auroras as far south as California and New Mexico. All detectors of the SEVAN network have registered an (FD) of ≈5% depletion in a 1-min time series of count rates. Approaching the maximum solar activity cycle, large variations of the particle flux intensity were registered on February 27, March 23, 2023, and March 24, 2024. In this work, we present measurements of these FDs performed on mountain altitudes on Aragats (Armenia), Lomnicky Stit (Slovakia), Mileshovka (Czechia), and at sea level DESY (Hamburg, Germany). We compared FD measurements made by SEVAN detectors and neutron monitors located on Aragats and Lomnicky Stit and made a correlation analysis of FD registration at different locations. Workplace Institute of Atmospheric Physics Contact Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Year of Publishing 2025 Electronic address https://www.sciencedirect.com/science/article/pii/S1364682624001330
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